Expandable file folder



FIG. 1 is a perspective view an expandable file folder showing our new design;

FIG. 2 is a front elevation view thereof, the rear elevational view being identical thereto;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an expandable file folder, substantially as shown and described. 